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Advisory record · GHSA-cw73-5f7h-m4gv

Upsonic: remote code execution vulnerability in its MCP server/task creation functionality

CVSS 9.8 CriticalCriticalEPSS 0.010 · 63rd percentile

Critical, because:

  • CVSS score 9.8: 9.0 or more.

How we decide what’s critical

Published by the GitHub Advisory Database at 29 Jun 2026, 11:50 UTC. agentprime has not analysed this yet, so whether it affects any app is not known.

PackageEcosystemAffectedFixed in
upsonicPyPI<0.72.00.72.0
Identifiers
GHSA-cw73-5f7h-m4gv · CVE-2026-30625 · PYSEC-2026-559
Weakness (CWE)
CWE-77
Tags
Published
29 Jun 2026
Updated
1 Jul 2026

Machine-written summary

Summary written by Claude Haiku from the source advisory. Not reviewed by a person.

Upsonic versions before 0.72.0 are vulnerable to remote code execution through the MCP server and task creation functionality. An attacker who can supply a crafted MCP task can use allowed commands such as npm and npx, which accept flags that run arbitrary OS commands, with the privileges of the Upsonic process. Upgrade to Upsonic 0.72.0 or later; that release adds a warning about Stdio servers that can run commands directly on the machine. The source gives few details on the exact request an attacker would send.

Written 10 Nov 2026.

Not analysed yet

We haven’t published our analysis of this Advisory yet. Once a person has reviewed it, this page will say what’s vulnerable, what has to be true for your app to be affected, and how to check.

Severity and exploitation

ScoreRatingCVSSVectorSource
9.8 Critical 3.1 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H OSV
  • CISA KEV Not listed.
  • EPSS 0.010, the 63rd percentile, on 14 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

This record came from the full history of the GitHub Advisory Database, published 29 Jun 2026. New records show when each source confirmed them.

Sources

Facts on this page come from the GitHub Advisory Database (CC-BY 4.0), OSV and the other sources listed, as published. We don’t reproduce full advisory descriptions, which can contain exploit code.